I pushed on to gain a station at the commencement of the hills on the eastern side of Whirlwind Plains, and also, if possible, to shoot a kangaroo to send to the ship:* I was so fortunate as to secure two; one of a new species, very small, and of a dark brown colour, with coarse hair, I found in rocky land, which it appears solely to inhabit, as it was also found near the ship. As, however, like the generality of kangaroos, this species only move of their own accord in the night time, they are rarely seen, and but one good specimen was obtained by Lieutenant Emery, who brought it to England, and submitted it to Mr. Gould, who has described it as Petrogale concinna. It is now in the British Museum. (*Footnote. I had now become quite an adept in this kind of sport. My plan was to direct a man to walk along near the river, where they are generally found, whilst I kept considerably above him and a little in advance, so that all those that were started running up from the bank in the curved direction, habitual with all kangaroos, passed within shot.) The height we visited was of coarse sandstone formation, and attained an elevation of 150 feet. As I was left to examine some parts of the river which had been passed in the night, I had a further opportunity of determining the value, and estimating the fertility of Whirlwind Plains. My examination only confirmed my previous conjectures in favour of the capabilities of the soil. From what I had seen at Port Essington, as ground considered favourable for the growth of cotton, there can be no doubt that on these plains it would thrive much better; but the soil on the Victoria is of too fertile a character to bear any comparison with that of Cobourg Peninsula. SILK COTTON-TREE. At Reach Hopeless, and at other points of the important stream I am describing we observed numerous specimens of a kind of silk cotton-tree (Bombax): the diameter was sometimes as great as twenty inches; and it not unfrequently rose to the height of twenty or thirty feet, though generally shorter. The pods were of an oval shape, and about two inches and a half in length; each pod was in three divisions and full of a silky cotton, with the seeds not imbedded but held at the extremity of the fibres. I brought home a specimen and presented it to Sir William Hooker, of the Royal Botanical Gardens at Kew, with whom I have since had some correspondence on the subject. He informs me that the plant is one hitherto undescribed; but that Sir Joseph Banks met with it in Captain Cook's voyage. November 17. We continued our descent of the river: stopping from time to time to complete the survey. In the end of Long Reach we noticed that the stream ran up two hours after high-water. After securing some observations for latitude under Station Peak in the early part of the night, we proceeded further down the river, delighted to escape from that mosquito-haunted neighbourhood. EFFECTS OF DRINKING SALT-WATER. November 18.